21994311

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10353849

約数列:

[1, 3, 17, 51, 53, 79, 103, 159, 237, 309, 901, 1343, 1751, 2703, 4029, 4187, 5253, 5459, 8137, 12561, 16377, 24411, 71179, 92803, 138329, 213537, 278409, 414987, 431261, 1293783, 7331437, 21994311]

約数ペア:

[(1, 21994311), (3, 7331437), (17, 1293783), (51, 431261), (53, 414987), (79, 278409), (103, 213537), (159, 138329), (237, 92803), (309, 71179), (901, 24411), (1343, 16377), (1751, 12561), (2703, 8137), (4029, 5459), (4187, 5253)]